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The best developer experience
for load testing

Open source load testing tool and SaaS
for engineering teams

Open Source >_Cloud >_
GitHub Stars
17.9k
Cloud >_Open Source >_
GitHub Stars
17.9k

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k6 Open Source

Free to use on your infrastructure.

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k6 Cloud

Zero-maintenance.
Accelerate your testing.

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How It Works

Same script for local and cloud tests

Open Source
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Cloud
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Built for engineering teams

Developers & SDETs

  • The k6 API and CLI are easy-to-use, flexible and powerful.

  • Write tests in Javascript that mimic real-world scenarios.

DevOps & SREs

  • Automate your tests to ensure that your infrastructure and application remain performant.

  • Configure SLOs in your k6 script to test the health of your services.

Software Testers & QAs

  • Create tests faster with our test builder, recorder or converters (JMeter, Postman, Swagger).

  • Extensive documentation, awesome community and first class support.

Powerful Scripting

No XML. No DSL. Just familiar scripting with ES6 JS

1import http from 'k6/http';
2import {check, sleep} from 'k6';
3
4export default function() {
5  const data = {username: 'username', password: 'password'};
6  let res = http.post('https://myapi.com/login/', data);
7  check(res, { 'success login': (r) => r.status === 200 });
8  sleep(0.3);
9}

Integrations

Leverage k6 in your workflow with the tools your team uses every day

Postman
GraphQL
Apache Kafka
Azure
Datadog
CircleCI
Grafana
Gitlab
New Relic
GitHub
Visual Studio
20+IntegrationsView all >_

Still stuck with JMeter?

"The engineering effort of writing tests for just one of our microservices was going to be 2+ Engineering weeks in JMeter, versus the ½ day it took us in k6!"

Alex Hibbitt, Site Reliability Engineer.

k6 included in tech radar

What our users are saying

I’ve been trying a bunch of different tech lately for load testing and man nothing comes close to how good @k6_io is

Nick Chapsas

Nick Chapsas

@nickchapsas

@k6_io thank you for creating an amazing open source product. I wrote my own thread ripper for load testing and you just saved my socks with the integration tools you have by default. Anyone looking to do load testing highly recommend using k6. It also reminds me of snowboarding.

FraggleRock613

FraggleRock613

@schuran

It's time for me to once again sing the praises of @k6_io. If you've ever written a load test I think you'll likely agree it is the grungiest of grungy tasks. k6 makes it fun. It's like Greasemonkey for load testing. Cannot recommend enough.

Aaron Boodman

Aaron Boodman

@aboodman

I'm 90% complet on my #PoC and in my professional opinion @k6_io is definitely a #gamechanger for #performance #testing allows #shiftleft excellent #docs support 4 #Docker #javascript custom #metrics and establish #thresholds to pass/fail #cicd builds for both #webui & #API

G Barnes

G Barnes

@G0GMANGO

I've toyed with a few load testing tools over the years, but only today tried @k6_io, and wow, is it pleasant to use. Haven't tried the hosted version, but for quick and easy CLI stuff, absolutely wonderful.

brettflorio

brettflorio

@brettflorio

Toying around with @k6_io tonight. Pretty impressed with how easy it is to set up (yay @Docker!) and to start building test scripts. Some early results: pic.twitter.com/LGCESvFMlv

Cees-Jan Kiewiet

Cees-Jan Kiewiet

@WyriHaximus

I love products like @k6_io - very technical and geeky domain, yet the product is extremely user friendly and you can understand and start using it within *seconds*, not even minutes. Great job.

Josef Richter

Josef Richter

@josefrichter

personally using @k6_io and its has helped us quite a lot already. Definitely worth adding to your testing pipeline.

Toyer M

Toyer M

@tottiLFC

Lately I have been using @k6_io for performance testing the RESTful APIs we build and I simply fell in love with it. It so simple and easy to use, i highly recommend it!!

shradha khard

shradha khard

@ShradhaKhard

Loving @k6_io for integrating perf tests into @AzureDevOps pipelines. Great documentation, easy to use..

Vamsee Konda

Vamsee Konda

@VamseeKonda

So @k6_io is probably my new favourite tool. Super quick to get set up and running load tests 😻

Morrison Cole

Morrison Cole

@morrisoncole

For anyone interested in load / stress testing, I’ve been using @k6_io recently and has been an absolute pleasure. Script up your flow using JS and away you go. Load tests in source control FTW. API for build sever runs too, beautiful.

Michael Law

Michael Law

@milaw

Holly Molly, using @k6_io to do stress test and send the metrics to #DataDog on real time, amazing tool.

Open source and written in #golang

Brayan Bautista

Brayan Bautista

@braybaut

Yesterday was awesome! I whipped up a @k6_io extension in @golang so my load tests can publish to @nats_io. Took about an hour and a half and the end result was 57 lines of Go :D #golang

Lasse Højgaard

Lasse Højgaard

@lhojgaard

Code-driven, JavaScript load tests that fit into our existing tool chain, clean APIs, command line so easy to automate and with a flag can run the same load test from the cloud in multiple locations. Haven’t had time to blog about it but k6 came out top of multiple tools tested

Ben Foster

Ben Foster

@benfosterdev

Why people love k6?

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